HN paints an overly gloomy picture of Germany. All points mentioned contain a kernel of truth but also a pessimistic linear regression concerning the outlook of the future. We've got a very minor recession going on, that's all. The economy will turn around next year.
The energy crisis is of the higher price than usual variety (and is already way past its peak; look at the 5y chart: https://ycharts.com/indicators/germany_natural_gas_border_pr...). The greenefication of our electrical grid is ongoing and will cost us a ton of money over the next 5-10 years, but will pay off after that (yes, it would have been better to keep the atomic power plants running until then; that's one of the few irrational decision done by the previous conservative government and confirmed by the current government).
We had a large immigration spike in 2015 and another one in 2022 (Syria and Ukraine), overfilling the immigration centers.
Aging population is a thing, as in any other western country. Turns out that immigration is one of the things that counteracts it! And we're currently (and for the next decade) in serious need of unskilled labor, so even the 40% of syrian refugees that haven't gotten work yet (many of those because of the slow bureaucracy...) will be needed.
It's certainly not all sunshine and rainbows, but it's also certainly not a crumbling country without a future.